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Date:   Mon, 16 Apr 2018 15:40:21 +0530
From:   Viresh Kumar <viresh.kumar@linaro.org>
To:     Daniel Lezcano <daniel.lezcano@linaro.org>
Cc:     Sudeep Holla <sudeep.holla@arm.com>, edubezval@gmail.com,
        kevin.wangtao@linaro.org, leo.yan@linaro.org,
        vincent.guittot@linaro.org, linux-kernel@vger.kernel.org,
        javi.merino@kernel.org, rui.zhang@intel.com,
        daniel.thompson@linaro.org, linux-pm@vger.kernel.org,
        Amit Daniel Kachhap <amit.kachhap@gmail.com>
Subject: Re: [PATCH v3 6/7] thermal/drivers/cpu_cooling: Introduce the cpu
 idle cooling driver
Message-ID: <20180416101021.GD4244@vireshk-i7>
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On 16-04-18, 12:03, Daniel Lezcano wrote:
> On 16/04/2018 11:50, Viresh Kumar wrote:
> > On 16-04-18, 11:45, Daniel Lezcano wrote:
> >> Can you elaborate a bit ? I'm not sure to get the point.
> > 
> > Sure. With your current code on Hikey960 (big/LITTLE), you end up
> > creating two cooling devices, one for the big cluster and one for
> > small cluster. Which is the right thing to do, as we also have two
> > cpufreq cooling devices.
> > 
> > But with the change Sudeep is referring to, the helper you used to get
> > cluster id will return 0 (SoC id) for all the 8 CPUs. So your code
> > will end up creating a single cpuidle cooling device for all the CPUs.
> > Which would be wrong.
> 
> Is the semantic of topology_physical_package_id changing ?

That's what I understood from his email.

> I don't
> understand the change Sudeep is referring to.
> 
> I saw this attempt:
> 
> https://patchwork.kernel.org/patch/9959977/

@Sudeep: Is using topology_cod_id() is okay in that case ?

-- 
viresh